ULE vs. 4BSD in RELENG_7

[Josh Carroll]

Jeff,

I just ran through some of my benchmarks on a kernel build from
sources as of today, and I've noticed an improvement for the ffmpeg
workload. Here's a comparison of 4bsd, ule (BETA1) and ule (BETA3).
This is vanilla source with no patches applied:

x 4bsd
+ ule
* uleb3
+--------------------------------------------------------------------------------------------------+
|x       x   x x                          *           * *  *  *
       +    +  ++          +|
|   |____A_____|                               |_______AM_____|
        |______A_______|    |
+--------------------------------------------------------------------------------------------------+
    N           Min           Max        Median           Avg        Stddev
x   5         93.28         94.05         93.74        93.746    0.29686697
+   5         97.56          98.7         98.03        98.042    0.41924933
Difference at 95.0% confidence
        4.296 +/- 0.529778
        4.5826% +/- 0.565121%
        (Student's t, pooled s = 0.363249)
*   5         95.58         96.69         96.37        96.278    0.42446437
Difference at 95.0% confidence
        2.532 +/- 0.534176
        2.70092% +/- 0.569812%
        (Student's t, pooled s = 0.366265)

Unfortunately, I only have 3 data points for the buildworld and
sysbench runs. buildworld has slowed down slightly, and sysbench has
slightly improved:

buildworld:

x 4bsd
+ ule
* uleb3
+--------------------------------------------------------------------------------------------------+
|x     x         x              xx                               +
+    +    +       +* *     *|
|   |____________MA_____________|
|________A________|   |__MA____||
+--------------------------------------------------------------------------------------------------+
    N           Min           Max        Median           Avg        Stddev
x   5        804.27        813.06        808.75       808.976     3.9655807
+   5        822.11        828.74        825.13       825.248     2.5607655
Difference at 95.0% confidence
        16.272 +/- 4.86816
        2.01143% +/- 0.601768%
        (Student's t, pooled s = 3.33791)
*   3        829.15        831.33        829.73        830.07     1.1290704
Difference at 95.0% confidence
        21.094 +/- 5.90231
        2.60749% +/- 0.729603%
        (Student's t, pooled s = 3.30285)

sysbench (8 threads):

x 4bsd
+ ule
* uleb3
+--------------------------------------------------------------------------------------------------+
|x  x    xx x                                                        +
          ++  *  + *       *|
|  |___A_M__|
   |______AM_|____|MA______||
+--------------------------------------------------------------------------------------------------+
    N           Min           Max        Median           Avg        Stddev
x   5       2151.75       2172.05        2166.7       2163.14     8.1262968
+   5       2274.13       2309.66       2298.99       2296.89     13.648515
Difference at 95.0% confidence
        133.75 +/- 16.3813
        6.18314% +/- 0.757294%
        (Student's t, pooled s = 11.2321)
*   3       2303.61       2327.29       2313.17       2314.69     11.912951
Difference at 95.0% confidence
        151.55 +/- 17.0782
        7.00602% +/- 0.789509%
        (Student's t, pooled s = 9.5567)


Thanks,
Josh